42. If you want to obtain the edge with your opponent while playing the sport, you must________.
(A) stay in the rearcourt and let your advantageous partner handle everything
(B) hit the ball with the knuckles as frequently as possible
(C) swing at the shuttlecock and let it travel in full length and let your opponent playforehand smashes
(D) hit with the palm as well as the hand leading and let your opponent play backhand~ 4 ~